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Originally Posted by tobybul
Can you tell me what you did? Did you try it? What happened?
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I'll chime in here. R-134 does not cool as well in systems originally designed for R-12. It's better than nothing, but the newer refrigerants (Freeze-12, AutoFreeze) that are designed to replace R-12 are much better in your old system.
Just $.02 from someone with a R-134 300SD and an AutoFreeze Saab.